Quick answers
- Does Valerie K. Nelson-Mason accept Medicare assignment?
- Yes. Medicare's clinician data says Valerie K. Nelson-Mason accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Valerie K. Nelson-Mason's NPI number?
- 1316986508. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Valerie K. Nelson-Mason is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 Medical PlzLake Saint Louis, MO 63367 (636) 625‑5200
- 300 1st Capitol DrSaint Charles, MO 63301 (636) 947‑5000
Group practices
Medicare enrollment lists Valerie K. Nelson-Mason as a member of this group (CMS data updated October 2, 2026).
- SSM Health Care St Louis167 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Lake Saint Louis
Clinicians with the same Medicare primary specialty in Lake Saint Louis, MO — not a recommendation.
Other clinicians in SSM Health Care St Louis
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, San Diego School Of Medicine |
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1316986508 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians